Donny Wals • 11/5/2025

A deep dive into Collections, Sequences, and Iterators in Swift

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This technical article provides a comprehensive guide to Swift's iteration protocols - Sequence, Collection, and IteratorProtocol. It explains how for-in loops work under the hood, the differences between single-pass and multi-pass sequences, why iterators are typically structs, and covers advanced topics like async iteration and custom collections.

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#Collections #Iterators #Swift
A deep dive into Collections, Sequences, and Iterators in Swift

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